Custom knowles middot enhanced bass ba drivers fiios goal was to create a truly monumental multi ba driver iem'. '.strtoupper('t')hey aimed to shake up the current market of flagship multi ba driver iems and spent three years on refining it to do so'. '.strtoupper('f')or the ten balanced armature drivers fa19, they collaborated deeply with knowles'. '.strtoupper('t')ogether they built a custom enhanced bass balanced armature driver specifically for the fa19 to provide the listener with a deep low frequency experience uncommon in multi ba driver iems'. '.strtoupper('a')dditionally, fiio also worked closely with knowles to optimize the mid and high frequency drivers so tht they not only sound highly detailed but also pleasantly smooth'. '.strtoupper('w')ith the fa19 we carefully tuned all parts of the frequency response curve for a truly coherent and resolving sound'. '.strtoupper('w')elcome to a new world for multi ba iems, and the fiio fa19 will be your guide'. '.strtoupper('1')0 knowles ba design the fiio fa19 was designed based on both science and actual listening tests'. '.strtoupper('f')iio settled for using 4 custom knowles bass ba drivers, 2 knowles ed mid ba drivers and 4 knowles swfk treble ba drivers per ear monitor'. '.strtoupper('h')aving more drivers in an iem does provide certain advantages'. '.strtoupper('i')t significantly increases the energy density within a given frequency range, resulting in more detail reproduced'. '.strtoupper('t')his is especially apparent during dynamic audio passages, where more drivers are better able to handle the nuances present, ensuring that the resulting sound is not compromised'. '.strtoupper('t')hus, the iem is better able to faithfully reproduce the original sound'. '.strtoupper('w')hen tuning iems, it is important that there are ample energy reserves from the drivers so that the engineers have enough to work with to achieve their sound goals'. '.strtoupper('t')his may simply not be possible with fewer drivers'. '.strtoupper('t')hus the fa19 employs the outstanding ba drivers'. '.strtoupper('a')nd the physical electronic three way crossover accurately segments different drivers working on different frequency ranges, resulting in a clear, reference monitor like sound quality'. '.strtoupper('t')he fa19 is an iem that reaches the height of sound quality with a thunderous impact, being able to faithfully reproduce every last single audio detail'. '.strtoupper('n')egative feedback bass enhancement system with four custom enhanced bass balanced armature drivers per channel developed by fiio in collaboration with knowles, the fa19 boasts ample bass'. '.strtoupper('e')ngineers creatively made use of the precise dlp 3d printing technology to create a shell that helps to guide this low frequency energy into the earphones rear cavity, effectively lowering the resonant frequency there ndash essentially a negative feedback bass enhancement system'. '.strtoupper('t')he result is a bass that reaches extremely deep, uncommon among iems of its class'. '.strtoupper('m')id frequency notch filter a smooth mid frequency curve not only stems from the core units quality but also results from meticulous tuning by professional acousticians'. '.strtoupper('t')he fa19 employs two classic knowles ed mid ba drivers, known for their high resolution and favoured by demanding listeners'. '.strtoupper('h')owever, if not implemented properly they can sometimes exhibit sibilance which negatively affects the overall listening experience'. '.strtoupper('t')o address this, engineers have specially designed a mid frequency notch filter at the bottom of these two mid ba drivers'. '.strtoupper('r')ubycon audiophile grade crossover capacitors truly be immersed with each striking musical note thanks to a precise crossover'. '.strtoupper('t')he fa19 employs audiophile grade film capacitors as its electronic crossover components, which boast exceptional precision'. '.strtoupper('w')hile typical resistors used for crossovers have an error tolerance of around 1%, the fa19s resistors have an impressively low error tolerance of 0.1%'. '.strtoupper('t')hus, compared to ordinary ceramic capacitors, the fa19 not only attains more accurate crossover points but also features enhanced high frequency resolution without sacrificing tonal finesse'. '.strtoupper('b')roken down into figures, this means that the new fiio fa10 with its total of ten drivers can reproduce a frequency range between 20 hz and 40 khz, with an impedance of just 10 ohms and a sensitivity of 106 db'. '.strtoupper('s').turbo patented acoustic design the fa19 incorporates fiios patented s.turbo acoustic turbine shaped design'. '.strtoupper('b')y extending the tube that guides low frequencies, it serves as a filtering device that effectively eliminates high frequency sound waves emanating from the bass ba drivers'. '.strtoupper('t')his ensures a smooth transition between low and mid frequencies'. '.strtoupper('t')his also leads to a cleaner split between the low and mid frequencies, resulting in purer sound that better reflects the original sound of music'. '.strtoupper('m')onitor hifi mode switch choose between two carefully crafted listening modes, by easily flipping a switch on the fly on the back of the iems'. '.strtoupper('u')se the fa19 as an audio production tool anytime, anywhere'. '.strtoupper('h')igh end cable for stunning sound the fa19 comes standard with a high purity pure silver cable, consisting 8 strands of 28 wires each for a total of 224 wires'. '.strtoupper('e')ach individual wire is independently ...